Remote control device



July 22 1924.

F. W. MILLS REMOTE CONTROL DEVICE Filed Nov. 7. 1921 ,A ww.

Patented July Z2, 1924.

UNITED STATES rATEnr cerise.

FRANK W, MILLS, 0F CHICAGO, ILLINOIS.

REMOTE CONTROL DEVICE.

Appncation mea November 7, 192i. 4serial no. 513,616.

To all whom 'i1/may concern: f

Be it known that I, FRANK W. MILLs, a citizen of the United States,residing at 52 North Kedzie Avenue, Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Remote Control Devices, of which the following is a specification.

'Ihis invention relates to remo-te control devices and is fully described in the following specification and shown in the accompanying drawings, in which the figures are in side elevation of the device partly in section.

'Iwo cylinders 10 and 11 are securely fastened to a base 12 and are connected by passages 13 and 14 with reservoirs 15 and 16 respectively. n

The pistons 17 and 18 are slidable in the cylinders 10 and 11 and have piston rods 19 and 20 which pass through suitable guides in the upper cylinder head 21 and 22 respectively. These piston rods are pivotally connected to connecting rods 23 and 24 which in turn are pivotally connected to the ends of the beam 25 which is secured to a shaft 26, the latter being journalled in the pedestal 27 which is carried by the base 12.

A viscous liquid A such as oil is placed in the bottom of the cylinders 10 Vand 11 contacting with the bottoms of the pistons and extending across into the reservoirs 15 and 16. rlhe air space in the top of the reservoir 15 communicates through the pipes 28, 29 and 30 with the top of a similar reservoir 31 which communicates through the passage 32 with the cylinder 33. A piston 34 is slidable in the cylinder 33 and has a piston rod 35 secured thereto which passes through a guide in the head of this cylinder and connects with the beam 36 by means of a connecting rod 37. This beam is secured to a shaft 38 which is suitably journalled in a pedestal 39.

The reservoir 16 is likewise connected by means of pipes 40, 41 and 42 with-the top of the reservoir 43 which communicates with the cylinder 44 through the passage 45. A piston 46 is slidable in this cylinder and is operably connected to the beam 36, by means of the piston rod 47 and the connecting rod 48, the latter being connected to the beam 36 on the opposite side of the shaft 38 from the connecting rod 37.

The shaft 38 is illustrated as having a signal arm 49 keyed thereto which is counterbalanced by means of a weight 50. Theshaft 26 has an operating handle 51 keyed thereon. The pipe lines 28 and 4() are connected to a suitable source of compressed air and the like, 52by means of pipes 53 and 54 respectively. Each of these lines is controlled by means of a valve 55 and 56 and a valve 57 vcloses the single pipe leading to the co-mpressed air tank 52.

The operation of this device is as follows:

The valves 55 and 56 are opened and the valve 57 is closed, the tank 52 being under compressed air pressure. The valve 57 is then opened and air pressure admitted to the top of the reservoirs 15, 16, 31 and 43. Owing to the presence of the viscous oil A, this air pressure will not leak past the pistons as would otherwise be the case. Consequently, where the size of the reservoir is large, as compared to the volume of the pipe connecting the reservoir, it will not often be necessary to admit compressed air from the tank 52. As soon as the reservoirs are brought up to a uniform pressure the valves 55, 56 and 57 are closed.

The full line position of the lever 51 corresponds to the full line position of the arm 49. When it is desired to swing the arm 49 the operating lever 51 is shifted to the right to an angle of 90o as indicated in dotted lines or until the beam 25 strikes the stop 58. Pressure of airy in the reservoir 16 will then act to force the oil down the reservoir 43 and up thro-ugh the passage 45 raising the piston 46 and causing the arm 49 to swing to the left until the beam 36 strikes the opposite side of the stop 59.

An opposite movement of the operating lever 51 will cause the arm 49 to be returned to the full line vertical position.

While I have shown and described but single embodiment of my invention, it is to be understood that it is capable of marry modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention as broadly as possible in view of the prior art.

What I claim as new and desire to secure by Letters Patent, is:

1. In combination, two pairs of cylinders, the cylinders of each pair being connected by a pipe line, a piston in each cylinder, gas

in said lines, a liquid. bet-Ween.. said. gas andy said pistons and means `for simultaneously moving the pistons of one pair in opposite directions to cause the other pistons of said pairs to be moved correspondingly.

2. In combination,l tvvo pairs of cylinders, the cylinders of each pair being connected by a pipe line,apiston in each cylinder, gas in said lines, a liquid between said gas and said pistons, a reservoir connectedto eachy cylinder and means. for simultaneously moving the pistons oi:l

one pair in opposite direetionsto cause the other p istonsy of said pairs to be moved correspondingly.

3. In combination, two pairs of cylinders, the cylinders of each pair being connected by aV pipe line, a piston in eacli cylinder, gas in said lines, a liquid between said gas and said pistons, means or raising the gas pressure in. the two lines to a like amount and means for simultaneously moving the pistons of one pair in opposite directions to cause the other pistons oi said pairs to be moved correspondingly.

FRANK WV. MILLS. 

